What’s Vulnerable › Vulnerabilities

CVE-2021-40509

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-09-04 · updated 2026-06-17
• Weakness: CWE-79

Description

ViewCommon.java in JForum2 2.7.0 allows XSS via a user signature.

Affected products

• Jforum: 2.7.0

References

• http://packetstormsecurity.com/files/164045/jforum-2.7.0-Cross-Site-Scripting.html
• http://seclists.org/fulldisclosure/2021/Sep/13
• https://lists.openwall.net/full-disclosure/2021/09/03/7
• https://sourceforge.net/p/jforum2/code/934/
• http://packetstormsecurity.com/files/164045/jforum-2.7.0-Cross-Site-Scripting.html
• http://seclists.org/fulldisclosure/2021/Sep/13
• https://lists.openwall.net/full-disclosure/2021/09/03/7
• https://sourceforge.net/p/jforum2/code/934/

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